How many types of people are there in this world!

There are millions of different kinds of people in this world.. I mean no is the same as me.. I am me and no one else is.. It's nice.. How ever people can be alike meaning nice, sensitive, outgoing, caring, trusting, understanding and another person can be the same.. But no one in this world is exactly the same.. At least I don't think so anyway..

there are lots of people around the world..Let's say billions of them. Why they differ? Well, they grew up in different cultures and each of us are made unique. There may be no scientific explainations for this but hey that's the way it is. We should be happy and thankful about this.